M51132L/FP

Rev.1.0, Sep.05.2003, page 3 of 11

Pin Description

Pin No.

Pin Name

Function

Typical DC Voltage

1

Vcc

DC 8 to 15 V is applied (rated voltage 12 V)

2

Input 1

Maximum input 3.4 Vrms (Typ.)

5.5 V

3

Output 1

4.8 V

4

Reference supply voltage

output

Maximum output current 10 mA (Typ.) built-in short

circuit protection circuit

5.2 V

5

Filter

12 V

6

No connection

Can be used for wire repeater to GND, etc.

7

GND

8

Volume/volume 1 control

Left/right simultaneous volume or channel 1 volume is

controlled by this value in the range of 0 to 5.2 V DC.

9

Pass through switch

shock noise reduction

Transit noise to the ear is softened by slowly switching

between pass through and VCA with time constant when

the pass through switch is turned on/off. The time

constant is determined by externally connected

capacitor. T(sec) = 1.2

× C × 20k

5.2 V for pass through

and 0 V for VCA

10

Balance/volume 2 control

Balance or channel 2 volume is controlled with 0 to 5.2 V

11

Pass through/VCA switch

Operates as VCA with 0 V, and passes through the input

to output with 5.2 V

12

Control mode switch

Operates as channel 1 volume at pin 8 and as channel 2

volume at pin 10 with 0 V.

Operates as channel 1 and channel 2 simultaneous

volume at pin 8 and as balance at pin 10 with 5.2 V.

13

Output 2

4.8 V

14

Input 2

Maximum input 3.4 Vrms (Typ.)

5.5 V

Absolute Maximum Ratings

(Ta = 25°C, unless otherwise noted)

Item

Symbol

Ratings

Unit

Conditions

Supply voltage

Vcc

15.5

V

Quiescent

Circuit current

Icc

40

mA

Power dissipation

Pd

800(L)/550(FP)

mW

When mounted on PC board

Thermal derating

K

θ

8.0(L)/5.5(FP)

mW/°C

Ta

≥ 25°C

Operating temperature

Topr

–20 to +75

°C

Storage temperature

Tstg

–40 to +125

°C